TY  - GEN
AU  - Zill,Dennis G.
AU  - Cullen,Michael R.
TI  - Differential equations with boundary-value problems
SN  -  (acid-free paper)
U1  - 515.353 
PY  - 1997///
CY  -  Islamabad
PB  -  National Book Foundation Pub. Co.
KW  - Boundary value problems
KW  - Differential equations
ER  -